JavaScript Editor Javascript debugger     Website design 

↑

Appendix C. Migrating from PHP 5.0.x to PHP 5.1.x

Table of Contents

Key PHP 5.1.x features
Changes in reference handling
Overview
Code that worked under PHP 4.3, but now fails
Code that worked under PHP 4.3.x, but now throws an error
Code that failed under PHP 4.3.x, but now works
Code that should have worked under PHP 5.0.x
Warnings that came and went
Reading []
Integer values in function parameters
Class and object changes
instanceof, is_a(), is_subclass_of() and catch
Abstract private methods
Access modifiers in interfaces
Changes in inheritance rules
Class constants
Extensions
Extensions that are gone from the PHP core
Class constants in new PHP 5.1.x extensions
Date/time support
Changes in database support
PDO overview
Changes in MySQL support
Changes in SQLite support
Checking for E_STRICT

Key PHP 5.1.x features

Some of the key features of PHP 5.1.x include:

  • A complete rewrite of date handling code, with improved timezone support.

  • Significant performance improvements compared to PHP 5.0.X.

  • PDO extension is now enabled by default.

  • Over 30 new functions in various extensions and built-in functionality.

  • Over 400 various bug fixes.


→